Some patients with chronic otitis media whose eardrums have been perforated in the clinic do not quite understand how to use in-ear preparations, so I would like to give you a few words here: 1. First of all, we must be sure that the disease we are suffering from requires in-ear drops: we must have seen a doctor, who has prescribed in-ear drops. Generally, when there is less pus, there is only one kind of drops (in our hospital, it is often flurochlor drops), and when there is more pus, there are often two kinds of drops (in our hospital, it is often hydrogen peroxide + flurochlor drops). Why must I see a doctor instead of making a decision on my own? Sometimes, although it is chronic otitis media, the tympanic membrane is intact, so the doctor often does not recommend in-ear medication, but wants to unblock the eustachian tube by nasal administration (see previous article). 2. In-ear drops should be administered in the correct way: First, take 1 ml of hydrogen peroxide with a syringe and clench it slightly in your hand for 5 minutes to raise the temperature, otherwise it is sometimes too cold and may induce vertigo during the ear bath. Inject it into the ear with the affected ear facing upwards, a lot of bubbles will escape and push out the thick juice from the deep part of the ear canal, which we believe has many benefits for cleaning the deep part of the external ear canal. after 5 minutes, dry the area within reach of the superficial part of the external ear canal with a cotton swab. Then, lying on your side again with the affected ear facing upward, apply the flourochlor drops to the affected ear. The amount of medicine is slightly higher, about 5-10 drops. Then gently pull the auricle and press the ear screen several times to allow the solution to enter the middle ear. Keep lying on the side for about 5 minutes before moving the head position. 3-5 times a day, depending on the condition. 3. Precautions: A. Ask a specialist to see; especially for very young children, medication needs to be used very carefully! B. The medication should also be administered correctly and in a timely manner; C. After all drops are finished, wipe off the excess medication with a cotton swab; D. The use of in-the-ear medication for other reasons, such as cerumen embolism, is outside the scope of this article.